"Vincent R." <foru...@smartmobili.com> writes:
>> gcc will do the right thing if you put statements in an exception
>> region.
>
> Hum how gcc can do that kind of things, is it some kind of voodoo ?
> __except is not implemented yet and is more than a language construct
> because it's an
> OS thing.
> So maybe I need to say it once again, instructions inside __except needs to
> be
> put inside a function by the compiler .
Can you explain why that is? I don't know how SEH works; how does the
OS get involved?
> Let's imagine seh were designed differently, I mean for instance let's say
> instead
> of putting instructions in a function it would put ins directly without any
> prologue and epilogue
> would you still tell me that eh region will do what I need.
gcc supports C++ exceptions on all targets but does not put anything in
a function and does not use a separate prologue or epilogue.
> Ok so now forget my previous questions, seh and so on.
> I am going to express my problem differently, let's say I want to developp
> a tool based on GCC
> and used to tranform code.
>
> I mean it would parse source code and if it detects __transform keyword
> make some tranformation,
> generate IL and then output the tranformed source code.
> Original code is :
>
> int main()
> {
> __transform( printf("hello"); printf("world"), 10 );
> }
>
> and I would like to obtain
>
> int main()
> {
> }
>
> int func1()
> {
> printf("hello");
> printf("world");
> return 10
> }
>
> So my question is when parsing source code and when detetcing __transform
> keyword you agree that
> I need to generate a function and put instructions in it.
> So in this case should we use start_function ?
> Don't tell me to use eh region or I am getting depressed.
It seems to me that you would want to treat it as a nested function.
So, yes, you should use start_function. See
c_parser_declaration_or_fndef when nested is true. If the code inside
__transform is not permitted to refer to variables defined in main, then
you might need to do some additional work to prevent that from
happening.
Ian
